I have 4 Activity. the first being the login activity and the 4th being the user sends the data to the server. Now what I want to do is when the data is sent successfully,i wan the user to move to activity 2 from activity 4. How can i acheive this scenario.

I need to implement this handleSuccessSaveOrder() which will take me from 4th to 2nd activity

You need to analyze the response of the server you (as the connection method you use). Once processed this answer, if correct, create a linked Intent to Activity 2 and run it with startActivity (Intent).